--download-mpich=1 defaults to gforker i.e a single machine.
If you wish to run on multiple machines - then you'll have to figureout what mechanism you'd like to use - and then direct the MPI install for that method. For eg: - the common method is to use MPD. So you can install petsc with --download-mpich=1 --download-mpich-pm=mpd [Or install any MPI as you desire - separately - and then install PETSc with it]. Satish On Wed, 2 Dec 2009, ming zhu wrote: > ?With?--download-mpich=1,Petsc install mpi. However, since I want to run my > Petsc program on different machines and mpiexec -machinefile <machineifle> > does not work.?It complains:invalid mpiexec argument -machinefile. > Do I have to install mpi for this?? Or do other way? > Thank you > > > > > ___________________________________________________________ > ????????????????? > http://card.mail.cn.yahoo.com/